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JEE • CHEMISTRY • 14 TH GROUP ELEMENTS (P-BLOCK)

14 th group elements (p-block) practice · Medium

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Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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Showing 91-102 of 102 questions
91 Medium
91 of 102
Understanding +4 | -1
Tungsten carbides is an example of:
View answer and explanation
Correct option: D
Interstitial solid solution
Option D is correct because tungsten carbides are formed when small carbon atoms occupy the interstitial spaces within the tungsten lattice structure, making it an interstitial solid solution.
92 Medium
92 of 102
Remembering +4 | -1
Colour is imparted to glass by mixing:
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Correct option: B
Metal oxides
Option B (Metal oxides) is correct because the addition of different metal oxides to glass during its production imparts various colors.
93 Medium
93 of 102
Remembering +4 | -1
The compound that is white in colour is
View answer and explanation
Correct option: B
lead sulphate
Option B (lead sulphate) is correct because lead sulphate is a white solid.
94 Medium
94 of 102
Analyzing +4 | -1
(A): Diamond is harder than silica.

(R): The C−C{C}-{C} bonds in diamond are stronger than Si−O−Si{Si} - O- {Si} bonds in silica.
View answer and explanation
Correct option: A
Both (A) and (R) are true and (R) is the correct explanation of (A)
Option A (Both (A) and (R) are true and (R) is the correct explanation of (A)) is correct because diamond's hardness is due to the strong covalent C-C bonds, which are stronger than the Si-O-Si bonds in silica.
95 Medium
95 of 102
Understanding +4 | -1
Statement I : Silicones are water repelling in nature
Statement II : Silicones are organosilicon polymers, which have (−R2SiO−)( - {R_2}SiO - ) as repeating unit
View answer and explanation
Correct option: C
Both statements are true
Option C is correct because both statements are true: silicones are water-repelling due to the organic groups attached to silicon, and they are organosilicon polymers with the repeating unit (−R2SiO−)(- {R_2}SiO - ).
96 Medium
96 of 102
Understanding +4 | -1
Which of the following statement(s) is/are correct regarding CO\mathrm{CO} ?

I. It is colourless and odourless gas.

II. It is water soluble.

III. It is water insoluble.

IV. It acts as reducing agent.

The correct statement(s) is/are
View answer and explanation
Correct option: C
I, III and IV
Option C (I, III and IV) is correct because CO is a colorless, odorless, water-insoluble gas and acts as a reducing agent.
97 Medium
97 of 102
Understanding +4 | -1
Which of the following option is correct for the below given two statements?

Statement (I): Silica is almost non-reactive

Statement (II): Si−O{Si}-{O} bond has very high bond enthalpy
View answer and explanation
Correct option: A
Both (I) and (II) are correct and (II) is the correct reason of (I)
Option A (Both (I) and (II) are correct and (II) is the correct reason of (I)) is correct because silica's non-reactivity is due to the high bond enthalpy of the Si-O bond.
98 Medium
98 of 102
Remembering +4 | -1
Prussic acid is the name of:
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Correct option: C
HCNHCN
Option C (HCNHCN) is correct because Prussic acid is the common name for hydrogen cyanide.
99 Medium
99 of 102
Understanding +4 | -1
Thermally more stable compound is
View answer and explanation
Correct option: A
CF4C{F_4}
Option A (CF4C{F_4}) is correct because the thermal stability decreases as the size of the halogen increases, due to weaker C-X bond strength.
100 Medium
100 of 102
Remembering +4 | -1
Crystalline silicon was obtained by:
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Correct option: C
Deville
Option C (Deville) is correct because crystalline silicon was first obtained by Deville.
101 Medium
101 of 102
Remembering +4 | -1
Which glass has the highest percentage of lead?
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Correct option: B
Flint glass
Option B (Flint glass) is correct because flint glass, also known as lead glass, contains a high percentage of lead oxide (PbO).
102 Medium
102 of 102
Understanding +4 | -1
Assertion (A) : CO\mathrm{CO} is toxic.

Reason (R) : CO\mathrm{CO} forms complex with haemoglobin in the blood, and this complex is more stable than oxy-haemoglobin.
View answer and explanation
Correct option: A
Both A\mathbf{A} and R\mathbf{R} are true and R\mathbf{R} is the correct explanation of A\mathbf{A}.
Option A is correct because both the assertion and reason are true, and the reason correctly explains why CO is toxic.
Revision notes and key takeaways

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